I just released an android app to the market last week which I believe will be extremely helpful to those trying to deal with the high gas prices. There have been quite a few studies about how the average driver can save on gas. A study by Edmunds summarizes the results best in an easy-to-read article. Basically, by altering your driving habits to reduce breaking, hard accelerating and speeding, you can see some serious fuel use improvements (one study saw 45% improvement, although Edmunds finds 35%). This is like Weight Watchers for your car, turning that 25 MPG beast to 34 MPG dieter.
The application, known as Open Road: Fuel Economy Assistant will track those behaviors for you so that you can actually measure your results. All you need to do is select your car from the database (or build you custom car) and press Start before you leave on your trip. As you drive, you will see live and trip averaged fuel economy. There is also a display for how much that individual trip cost you.
Check it out and give me some feedback! I love feedback and look forward to incorporating your awesome suggestions.
PS. The iOS version will be released in a week or so. Like the facebook page to get news about its release.